Radio band

Distance & Coverage

3.5MHz (80 metres)

Generally up to 150KM during the day or up to 3000KM at night.

7MHz (40 metres)

Generally up to 1000KM during the day or world-wide at night during good conditions.

21 MHz (15 metres)

World-wide  - mostly during the day.

28 MHz (10 metres)

World-wide during periods of high sunspot activity and up to 3000km in summer.

144MHz (2 metres)

Local coverage plus world-wide via digital options.

432MHz (70cm) 

Local coverage, over 2000 km using something known as tropospheric ducting plus world-wide via digital options.